Method of finite element modelling of the stress-strain state parameters of a flat truss with parallel belts

The purpose of the study was to create a method for modelling the stress-strain state of a flat truss with parallel belts using multi-package software based on the finite element method. It was established that the software complexes LIRA-CAD 2016 R5 and ANSYS Workbench 14.5 are the most effective for calculating the parameters of the stress-strain state of flat trusses, since they provide high modelling efficiency due to the developed functionality and adaptability to engineering analysis tasks. In the course of the study, the capabilities and interfaces of these software environments were analysed, and simulations were performed for a truss with a triangular grid and dimensions of 18,000×3,600 mm, made of VCt3ps structural steel. Geometric and finite element models of trusses in the media of the identified calculation complexes were developed. For modelling, elements made of rolled corners with a cross-section of 100×100×10 mm were used, and nodal kerchiefs were made of steel sheet with a thickness of 10 mm. For the truss model, ANSYS Workbench 14.5 created a finite element grid with size sampling, in particular for styles, which provides more accurate determination of the parameters of the stress-strain state of SSS in critical zones of the truss. In LIRA-CAD 2016 R5, the truss model was divided into 10x10 mm elements. The proposed method included two main stages: at the first stage, a model was created to determine the stress-strain state of the truss and the environment of the LIRA-CAD 2016 R5 software suite, at the second stage, the results obtained were analysed in the environment of the ANSYS Workbench 14.5 calculation complex to optimise the design parameters. The use of this technique can significantly reduce the time required for design and calculations, which helps to increase the efficiency of designing trusses with parallel belts. The practical value of the development lies in the possibility of optimising the shapes and sizes of cross-sections of elements, which positively affects the economic efficiency of the designed trusses, reducing material costs and ensuring the durability of structures